Samenvatting
The National Road Administration in Sweden has initiated a comprehensive research project concerning traffic on multi lane roads, called TPMA (Traffic Performance on Major Arterials). One stage of this project is to develop a macromodel for basic four-lane road segments. This model is based on traffic data from sites with different road performances and posted speed limits. Three vehicle types are analysed: car, truck, and bus, and truck with trailer. (A)